The federal government’s release of new data on health-insurer payments under the Affordable Care Act is roiling the industry, including potentially affecting the timing of any deal for Humana Inc., as suitors pore over the detailed information disclosed late Tuesday.

Now more than ever, it is imperative for every Republican presidential candidate to present a concrete plan to replace ObamaCare. The Affordable Care Act remains unpopular: Wednesday’s RealClearPolitics average of polls showed 51.4% disapprove while only 43.6% approve. Voters are more likely to be opposed than are adults overall, and opponents are more fervent than supporters.

The White House’s victory at the Supreme Court last week removed a major threat to ObamaCare that could have rolled back coverage for 6.4 million people. President Obama declared after the ruling that the law has “been woven into the fabric of America,” while allies said the new insurance program and its related policy changes are here to stay.

President Barack Obama is aiming to use the momentum from a recent Supreme Court victory for his health care law to change the conversation from talk about undoing his signature domestic achievement to talk about how to improve it.

New Jersey Gov. Chris Christie added his name to the 2016 Republican presidential roster Tuesday, and Ohio Gov. John Kasich is expected to do the same in the next few weeks. Two brash, blunt politicians hoping to capitalize on purple-state bona fides—but both will have to overcome the ultimate apostasy in the GOP primary: their endorsement of Medicaid expansion, one of Obamacare’s biggest provisions.

The federal government announced Tuesday that it has $800 million remaining in its reimbursement fund for health insurers this year, a sign that marketplaces under ObamaCare needed less life support than expected.

Small businesses that reimburse employees for the cost of premiums for individual health insurance policies or pay their health costs directly will be fined up to $36,500 a year per employee under a new Internal Revenue Service regulation that takes effect July 1, 2015.

Taxpayer-funded Obamacare health insurance co-op’s may be running afoul of the law by giving extravagant paychecks to their top executives, according to a Daily Caller News Foundation investigation.

More than a million Americans have enrolled in the 23 non-profit Obamacare co-ops since they began in 2011. The co-ops were intended to be consumer-operated non-profits focused on delivering healthcare to the working poor and others needing health insurance.

Many big companies are pushing to cut spending on employee benefits—from pensions to health insurance—and could face labor strikes as a result.

In all, major employers have about 400,000 union workers whose contracts are up for negotiation this year. They include the Detroit auto makers, whose workforces have a combined 140,000 members of the United Auto Workers; a group of railroad operators including CSX Corp., with 142,000 union employees; and telecom companies like Verizon Communications Inc., which is in talks with about 40,000 wireline workers.

President Obama is taking his Medicaid expansion pitch to Tennessee this week to urge Republican officials to expand the low-income insurance program through the Affordable Care Act.

Expect more of that. After the law survived its latest potentially devastating legal challenge, Medicaid expansion will be a legacy-defining issue for the president during his last 18 months, one that will determine whether Obamacare achieves its full, desired impact.